demotionalize 

The act of taking a hilarious, cynical or poignant phrase or sentence and putting it on a demotivational poster with a relevant picture.

I thought of something funny at work, and when I get home, I'm totally going to demotionalize that shit! demotivational posters

demotionalize by windigo_demon January 4, 2012

emotionalizer 

One who manipulates other's emotions by lying about there own.

He's such an emotionalizer you can see her melting- listening to his hypnotic crappe.

emotionalizer by @thedocwho2 November 17, 2018

deemotionalize 

the act of taking away complete feeling for something/someone

I used to be crazy in love with him and i never got the chance to tell him how i felt. I had to deemotionalize our past just so i could move on.

deemotionalize by pirhanababy January 21, 2015